<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    class Ph {
      constructor(name) {
        this.name = name
        // this.say = function () {
        //   console.log(123);
        // }
      }
      say() {
        console.log(this);
      }
      say = () => {
        console.log(345);
      }
      static say() {
        console.log(this);
      }

    }
    let ph00 = new Ph('彭辉');
    console.log(ph00);

  </script>
</body>

</html>